Machine for rubbing or polishing stone.



PATENTED JULY L 1905.

G. BENSGH. MAGHIE FOR BUBBNG 0R IPOLISHING STONE.

APPLICATION FILED J'A1\I.l2. 1905.

E SHEETS-SHEET 2.

tro. 794,074..

Patented July 4.-, 190 5.

HUFi'lAV lilNlcCl'i, Oli Nitti" YORK, fri. Y.

SPECIFICATIN forming part of Letters Patent No. "QLOPMg, dated July 4:, 1905.

Application led January l2, 1905. Serial No. 240,759.

liteit known that l', i us'rav l'hcN'rsou, a citi- Zen of the United States, resid ing' in New lYork, borough of Brooklyn, in the State of New York, have invented certain new and useful improvements in l /lachines for ltubbing or Polishing' Stone, of which the following` a specification.

This invention relates to certain improvements in machines for rubbing or polishing .stonewsuch as granite, marble, and other stonessaid machine having the advantage of being; portable, so that it may be carried to the work for rubbing' or polishingl the latter after it in position to be operated upon; and for this purpose the invention consists in the novel features and combinations of parts, to be fully described hereinafter and finally pointed out in the claims.

.ln the accompanying' drawings, illustrative of one embodiment of the invention, Figure l is a side elevation of my improved machine ior rubbing' or polishing' stone, shown as connected with a portable electromotor. Figs. 2 and 3, et and 5, 6 and 7, 8 and S) are respectively rear elevations and vertical transverse sections of different rubbing or polishing' tools that are used in my improved machine. lfigr. l() a front elevation of the machine, partly in vertical section, showing the supporting-platform, stationary pillar, channelbar, and movable pillar of the same; and Fig'. l1 is a vertical trani-worse section on line l1 i1, .rig-.10.

Similar letters of reference indicate correspending' parts throughout the several views.

My improved machine for rubbing1 or polishing stones is intended to be portablenthat is to say, the rubbing' and polishing' tools, the adjustable stand, and the electromotor by which rotary motion is imparted to the rnbbing' and polishing tools are capable of being carried to the place of use-viz., tothe place where the stone has been placed in position to be operated upon. For this purpose the machine consists of a portable platform l), which is preferably vmade of rectangular shape and suitable size and supported at its four corners by upright adjusting-screws fr, by which the same is leveled according to the 'floor or other support. On the platform l. is snjniortial a stationary tubular pillar l", in which. is supported an adjustable tubular pillar lg by means of a clainpingscrew a. .lhe adjustable pillar l is provided with a horizontal channebbar l5, of approximately ttshapcd cross-section and open at its upper part, so as to guide a horizontallyn1ovable carriage (l, which provided with rollers (fx, guided between the bottom of the channelbar ll and the inwardly-extendi11,e'top flanges t of the same, as shown clearly in Figs. l0 and l1. 'lhe carriage C is preferably provided, in addition to the rollers lr/X, with four horizontal rollers j, which bear against the sides of the channel-bar. On the platform of the carriage U is supported a third tubular pillar P, to which is applied by a suitable pivot connection N a tubular socket P, which is capa ble of forward or backward adjustment in a plane at right angles to the channel-bar B on the pillar P. In the pivoted socket l" is again supported a tubular pillar P, which is capable of vertical adjustment in the socket il?" and adapted to be clamped thereto by a setscrew s, said tubular pillar P5 being' provided at its upper end with a short sleeve P, in which the sleeve l of the shaft S of the rubbing or polishing tool is siipported, as shown clearly in Fig'. l. The sleeve l7 is held in position by a set-screw p, that passes through the supporting-sleevel;1m at the upn per end of the pillar lf.

The shaft S is connected at its front end, which is provided with a screw-socket, with a threaded stud on the center of the holder of the rubbing or polishing tool T and at its rear end by a universal joint J with a clutch D at the end of a flexible shaft F, which shaft is connected at its lower end by a universal joint J'l with the shaft of the elec tromotor M, which is mounted, with its usual accessories, on a suitable base, so as to be conveniently moved, with the portable stand of the rubbing or polishing machine, to the place of use, where the eleetromotor is connected by suitable conductors with a source of electricity, so that motion is imparted to the motor and by it to the flexible shaft and the rubbing or polishing.;` tool. ',lhe electro motor, as well as the rubbing and polishing machine, may be placed on a portable truck or other vehicle for being conveyed conveniently to the place of use.

The rubbing` or polishingtool can be made of different construction, according to the work to be performed by the same. lVhen straight surface rubbing or polishing` is to be accomplished, the tools shown in Figs. 2, 3, 4, and 5 can be used to advantage, in which a suitable disk of emery, carborundum, or other suitable abrading material is held in position by means of jaws which engage the circumference of the disk and are rigidly applied to the same by means of radial adjusting-screws c, connected with the center socket.

Then the work is roughly cut, several wheels may be use l, starting with a disk of coarse grain and finishing with a disk of tine grain. lhen a very good bottom or skin is desired, the emery or carborundum may be produced in Hakes and placed on the canvas disk either on the face or edge of the same, according to the work that is to be done. Then a polish is desired, the surface of the stone is first rubbed until a good bottom or skin is obtained and then polished by the use of a buffer-wheel of felt, to which water and puttypowder is applied before starting the machine.

Then difficult moldings or deep narrow sinkages are to be treated, emery or carbo-A rundum wheels are not used, but a canvas wheel, the circumference of which is shaped to suit the work, to which the emery or carborunduml is glued on in fiakes. The rubbers are used fiat' wherever possible; but when they are used on edge a clamp-spindle H is used, as shown in Figs. 6 and 7, between which thewheel of carborundum, emery, or canvas is held by clamping-plates. W'hen the emery or carborundum wheels are used on their fiat sides, their circumference may be beveled and the supporting-jaws attached to the beveled edge by means of the radial adjusting-screws. 'W here the circumferential edge of the wheels is at right angles to the face of the wheel, a cushion Z, of leather or other suitable material, is glued around the circumference of the wheel, to which the jaws, which are also formed at right angles, are attached, as shown in Figs. i and 5. When the wheels are used on their flat faces and the whole face of the tool is not necessary to be in contact with the work, aclampspindle H is used, as shown in Figs. S and 9, in whichone of the clamping-plates is countersunk into a center recess in the face of the wheel. lVhen it is desired to use the face of a felt buing-wheel, the felt is nailed to a disk of oak-wood of the same size as the buffing-wheel, in which case the heads of the nails are countersunk and lthe center portion. attached by screws to the face of the disk.

The essential features of the improved machine are, first, that the stand on which the rubbing or polishing tool is supported is portable, together with the motor for rota ting `the tool; second, that the lower portion of the stand is stationary, while the upper portion of the stand is movable in the horizontal channel-bar, so as to be moved by the operator to and fro over the work; third, that the rubbing or polishing tool can be adjusted by the upper movable pillar out of the plane of the channel-bar Ain a plane at right angles thereto, so as to set the tool to any suitable angle required by the work, and, fourth, that any desired tool can be attached to the rotary tool-shaft as required by the work.

My improved machine for rubbing or polishing stone is operated as follows: The machine is put up at the place of use by adjusting the platform relatively to the work, the channel-bar being so located as to be parallel with the face of the work. The supportingpillar for the channel-bar, as well as the supporting-pillar for the tool-shaft, are then extended and adjusted, so that the tool is placed close to the work, the upper pillar being then set to the proper inclination toward the face of the work and held by the hand of the operator, so that the effective rubbing or polishing action is performed thereon. The machine is adapted to be operated in any piace and on any shape of work to be done.

My improved machine is capable of operation at a very high speed, (from fifteen hundred to two thousand rotations per minute,) so that it will give a superior bottom or skin and a high gloss. In the rubbing or polishing machines heretofore in use the speed was limited to from two hundred to two hundred and fifty rotations per minute, as the tools when running at high speed force the material away by the centrifugal force, so that no work would be done on it. In my improved machine the abrading material is applied by the tool and the latter carried to the work, which can be finished without feeding any abrading material to the tool after the machine is started, so that the only limit to the speed of the tools would he the centrifugal force which they will be able to withstand. In case of the felt rubber for polishing enough material can be applied to the bunter before starting the machine to finish the work without feeding any additional material after the machine is started, and consequently the centrifugal foreewould not affect the same, as it is between the buffer and the work to be finished, while the time consumed for the work is so small that one application is sufiicient.

As the machine is portable it is possible to bring the machine to the work instead of bringing the work to the machine, as heretofore. This saves considerable time and money, as often the amount of rubbing or polishing is comparatively small and the work to be done IOO IIO

very bulliy, heavy, and dil'licult ot transpm'tation. V"When the work is already in position, as in a building erected, it is more convenient to place the machine on a suitable sealliold. and to work in any part ot the building, as it only requires an additional length ol conductors to connect it with thel source oll electricity. 'libe machine can rub and polish moldings or other work oi `irregular shape which heretofore could notbe linished except by hand and only in a much less perfifuttmanner than by the machine described.

lil aving` thus described my invention, l claim as new and desire to secure by Letters Patent l. ln a machine for rubbing or polishing stone, in combination, a stand, a cliannel-bar mounted thereon and adjustable toward and away from the same, a carriage guided along said channel-bar,l and a tool mounted on said earriag i.

2. ln a machine ot the class described, in combination, a stand, a pillar olI adjustable height mounted thereon, a channel-bm' supported by said pillar, a carriage guided along said channel-bar, and a tool mounted on said carriage.

El. ln eombinatiol'i, a stand ot adjustable height, a pillar mounted on said stand, a channel-bar supported on said pillar, a carriage guided along said channel-bar, and a tool mounted on said carriage.

fi. ,ln a machine for rubbing or polishing stone, in combination, a stand, a horizontal cliannel-bar mounted thereon, means for adjusting the height ol'I said channel-bar, a carriage guided along said channel-bar, a pillar mounted on said carriage, and a rotary toolshat't carried by said pillar.

ln combination, in a machine such as described, a stand ot adjustable l'ieight, an extensible `pillar on said stand, a channel-bar supported by said pillar, a carriage guided aloilg said channel-bar, and a tool mounted on said carriage.

(3. ln a machine for rubbing or polishing' stone, in combination, a chalimel-bar, a earriage guidei'l thereby, a pillar mounted on said carriage, a second pillar pivoted to the [irst pillar in a plane at right angles to the direction of movement ot said carriage, and a rotary tool-shaft carried by said second pillar.

7. `ln a machine for rubbing or polishing stone, in combination, a horizontal channelbar, a carriage movable therein, an upright pillar mounted on said carriage, a second pillar pivoted to said lirst pillar in a plane at right angl is to said chamiel-bar, and a rotary tool-shalt carried by said second pillar.

d. ln a machine 'tor rubbing or polishing stone, a channel-bar, a carriage guided thereby, a pillar ol'l adjustable length mounted on said carriage, and a rotary tool-shaft carried by said pillar.

2l. A, machine tor rubbing or polishingstone including in its construction a channel-bar, a carriage guided thereby, a pillar mounted on said carriage, an extensible pillar pivoted to said lirst-nanied pillar, and a tool carried by said extensible pillar.

10. A. machine for rubbing or polishing stone includingl in its construction a channelbar, a carriage guided thereby, a pillar lixedly niounted on said carriage, an extensible pillar pivoted to said lixed pillarin a plane at right angles to said clumnel-bar, and a tool carried by said extensible pillar.

ll. .ln a machine for rubbing or polishing stone, the combination oi' a portable platform, a vertical ly-adj ustable stand supported on said platform, said stand consisting otl a stationary lower portion provided with a horizontal channel-bal' and a movable Lipper portion, and a tool-shaft supported at the upper end olf the movable portion and having a rubbing or polishing tool mounted thereon.

l2. Vln a machine tor rubbing or polishing stone, the combination ot' a portable platform, a stationary pillar on the same, an adjustable pillar in said stationary pillar. a channel-bar mounted on said adjustable pillar, a movable carriage guided in said channel-bar, an upright pillar supported on said. carriage, a second pillar pivoted to the upright pillar, an adjustable pillar in the pivoted pillar, and a tool-shaft supported at the upper end ol said adjustable pillar and having' a rubbing or polishingl tool mounted thereon.

13. ln a machine for rubbing or polishing stone, the combination oli a portable plattornl, an extensible pillar on the same, a horizontal channel-bar supported on said pillar, a second pillar movable alone' said channelbar and provided with a pivoted portion, an adjustable Apillar in said pivoted portion, a sleeve supported on said adjustable pillar, a toolsha'lt, a sleeve surroiiuuling said shaft and supported in the sleeve at the upper end ot the zuljustable pillar, and a rubbingI or polishing tool attached to one end of said tool-shaft.

la. .ln combination, in a machine lor rnbbing or polishing stone, a portable jjilattorn'i, an adjustable pillar on the same, a horizontal channel-bar supported on said pillar, a movable pillar guided in said channel-bar and capable oit movement in the vertical plane ol, the channel-bar, means for adjusting' the upper part el said pillar in a plane at right angles to the plane o'l said channel-bar, and a toolshalt supported on said movable pillar and having` a rubbing or polishing tool mounted thereon.

ln testimcmy that l claim the lforegoing' as my invention lY have signed my name in presence ol two subscribing witnesses.

(l'UollAV BENltlUlil. `Witnesses:

lfa U1. (l-o n rml, lil nn ur J. Suu n man.

lIO 

